Evaluation of Size and Shape of Copper Phthalocyanine Tetrasulphonic Acid Tetra Sodium Salt and C. I. Reactive Blue 19 in Aqueous Solution

抄録

The aggregation of two dyes (1) copper phthalocyanine tetrasulfonic acid (CuPc) and (2) C. I. Reactive Blue 19 (RB19) was observed in aqueous solution by small-angle X-ray scattering (SAXS). Two CuPc molecules or six RB19 molecules were found to form the aggregate of a disk shape or an ellipsoidal shape in aqueous solution without salt, respectively. By adding salt, they aggregate further into an inclined cylinder composed of five CuPc molecules or an ellipsoid composed of 18 RB19 molecules. The detail of molecular arrangements in the aggregates was considered by comparing the scattering profiles calculated from the molecular models with the observed SAXS profiles.